Normalize newlines in merge & interpret-trailer

These two patches fix a problem where the trailer would be appended to the commit message without an empty line, so parsing the trailers again afterwards would fail.

In practice either one of the patches fixes the exact behavior I see but in both cases it makes sense to normalize the newlines.

The exact use case where this issue was found is a "git merge --no-edit" with a commit-msg hook that adds a trailer immediately afterwards. The input the commit-msg script gets is not terminated by a newline (which is fixed by the second commit) while the first one makes interpret-trailer capable of handling such input without a final newline.

Luca Weiss (2):
trailer: handle input without trailing newline
merge: make sure to terminate message with newline

 builtin/merge.c               | 1 +
 t/t7513-interpret-trailers.sh | 7 +++++++
 trailer.c                     | 3 +++
 3 files changed, 11 insertions(+)

base-commit: 75ae10bc75336db031ee58d13c5037b929235912
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1048%2Fz3ntu%2Fmaster-newline-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1048/z3ntu/master-newline-v1
Pull-Request: https://github.com/git/git/pull/1048

gitgitgadget